18161140046 has 12 divisors (see below), whose sum is σ = 31134247368. Its totient is φ = 7783129632.

The previous prime is 18161140013. The next prime is 18161140079. The reversal of 18161140046 is 64004116181.

It is an interprime number because it is at equal distance from previous prime (18161140013) and next prime (18161140079).

It is a junction number, because it is equal to n+sod(n) for n = 18161139994 and 18161140021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 486230 + ... + 522246.

It is an arithmetic number, because the mean of its divisors is an integer number (2594520614).

Almost surely, 2^18161140046 is an apocalyptic number.

18161140046 is a deficient number, since it is larger than the sum of its proper divisors (12973107322).

18161140046 is an frugal number, since it uses more digits than its factorization.

18161140046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72043 (or 36026 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The spelling of 18161140046 in words is "eighteen billion, one hundred sixty-one million, one hundred forty thousand, forty-six".